1. General CAD CAM Questions

• Q: What is the difference between CAD and CAM?
  A: CAD (Computer-Aided Design) is used for designing and drafting 2D/3D models. CAM (Computer-Aided Manufacturing) is used to generate toolpaths and control CNC machines for manufacturing.
• Q: What are the benefits of using CAD CAM software?
  A: Faster design process, improved accuracy, easy modification, simulation before manufacturing, and reduced production errors.

2. AutoCAD Interview Questions

• Q: What is a polyline?
  A: A polyline is a connected sequence of line or arc segments treated as a single object.
• Q: How do you use layers in AutoCAD?
  A: Layers help organize drawing components and allow visibility control, color assignment, and line-type management.

3. SolidWorks Interview Questions

• Q: What is the difference between a part and an assembly?
  A: A part is a single 3D component, while an assembly combines multiple parts to form a complete product.
• Q: What is parametric modeling?
  A: Parametric modeling allows dimensions and constraints to drive the geometry of the model. Any change updates the model accordingly.

4. CATIA / NX CAD Questions

• Q: What is Class-A surface modeling?
  A: Class-A surfaces are high-quality surfaces used in automotive and aerospace design with perfect curvature continuity (G2/G3). Used mainly in CATIA and NX.
• Q: Explain Boolean operations.
  A: Boolean operations (Add, Subtract, Intersect) are used to combine or modify solids in 3D modeling.

5. CAM & CNC Programming Questions

• Q: What is G-code?
  A: G-code is the language used to control CNC machines. It includes commands for motion, speed, feed, and tool operations.
• Q: What is a toolpath?
  A: A toolpath is the path that a cutting tool follows to machine a part. It is generated in CAM software based on the 3D model.
• Q: What is the difference between climb and conventional milling?
  A: In climb milling, the cutter rotates in the same direction as the feed. In conventional milling, it rotates against the feed direction.

Tips for Cracking CAD CAM Interviews

• Be clear with basic commands and interface navigation
• Showcase your project portfolio and mention tools used
• Understand manufacturing processes if applying for CAM roles
• Practice G-code reading and toolpath simulation

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